Pharmaceutical Grade. Creatine is a natural compound made in the body and is derived from the diet through meat products. In the body, Creatine is changed into a molecule called phosphocreatine which serves as a storage reservoir for regenerating ATP. ATP is the chemical source of energy for muscle contraction and quick energy. Phosphocreatine is an important source of ATP energy in muscle tissue and studies have shown that Creatine can increase the performance of athletes in activities that require quick burst of energy, such as sprinting and weight lifting. Creatine supplementation combined with strength training has been shown to cause dramatic improvements in muscle hypertrophy (size) and strength through cell volumization and increased protein synthesis.